public override SubNavigationMenuModel GetMenu()
{
if (IsHomePage(CurrentPage) || IsShowInHomeNavigation(CurrentPage))
{
return(null);
}
var contentUnderHeading = CurrentPage.AncestorsOrSelf().SingleOrDefault(pc => pc.Parent != null && pc.Parent.IsHeading());
var subMenuStartPage = contentUnderHeading ?? CurrentPage.AncestorsOrSelf().SingleOrDefault(pc => pc.Parent != null && IsHomePage(pc.Parent));
if (subMenuStartPage == null)
{
return(null);
}
var model = new SubNavigationMenuModel
{
Rows = GetSubNavigationMenuRows(subMenuStartPage, _groupHelper.IsGroupPage(subMenuStartPage)),
Parent = IsHomePage(CurrentPage.Parent) || IsContentUnavailable(CurrentPage.Parent)
? null
: MapToMenuItemModel(CurrentPage.Parent),
Title = GetNavigationName(subMenuStartPage),
IsTitleHidden = IsTitleHidden(subMenuStartPage),
ShowBreadcrumbs = IsShowBreadcrumbs(CurrentPage)
};
return(model);
}
protected virtual IEnumerable <SubNavigationMenuRowModel> GetSubNavigationMenuRows(IPublishedContent subMenuStartPage, bool isGroupSubNavigation)
{
if (!subMenuStartPage.IsContentPage() && !_groupHelper.IsGroupPage(subMenuStartPage))
{
return(Enumerable.Empty <SubNavigationMenuRowModel>());
}
var activeItems = CurrentPage.AncestorsOrSelf().Where(pc => !pc.IsHeading() && !IsHomePage(pc)).ToList();
var menuRows = activeItems
.Select(selectedItem =>
{
var availableContent = GetAvailableContent(selectedItem.Children);
if (isGroupSubNavigation)
{
return(ValidateGroupSubNavigationItems(availableContent).Select(MapToSubNavigationMenuItemModel));
}
return(availableContent.Select(MapToSubNavigationMenuItemModel));
})
.Select(menuItems => new SubNavigationMenuRowModel
{
Items = menuItems.ToList()
})
.ToList();
menuRows.Reverse();
var topLevelMenuRow = menuRows.First();
topLevelMenuRow.Items.Insert(0, MapToSubNavigationMenuItemModel(subMenuStartPage));
return(menuRows);
}
protected virtual IEnumerable <MenuItemModel> BuildLeftMenuTree(IPublishedContent parent, IList <int> excludeContentIds)
{
if (!parent.Children.Any())
{
yield break;
}
var children = GetAvailableContent(parent.Children).Where(pContent => !excludeContentIds.Contains(pContent.Id));
var activeMenuItem = CurrentPage.AncestorsOrSelf().FirstOrDefault(pc => !IsHideFromNavigation(pc));
foreach (var child in children)
{
var isHeading = child.IsHeading();
var newMenuItem = new MenuItemModel
{
Id = child.Id,
Name = GetNavigationName(child),
Url = isHeading ? string.Empty : child.Url,
IsActive = child == activeMenuItem,
IsHeading = isHeading,
Children = BuildLeftMenuTree(child, excludeContentIds).ToList()
};
yield return(newMenuItem);
}
}
